Stability of a nonsingular cosmological model in the Einstein-Cartan theory

Details Stability of a nonsingular cosmological model in the Einstein-Cartan theory Stability of a nonsingular cosmological model in the Einstein-Cartan theory

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ukfiz..35..327z&link_type=abstract

Ukrainskii Fizicheskii Zhurnal (ISSN 0503-1265), vol. 35, March 1990, p. 327-335. In Russian.

Mathematics

Astronomical Models, Cosmology, Gravitational Fields, Relativistic Theory, Riemann Waves, Einstein Equations, Galactic Evolution, Perturbation Theory, Scalars, Tensors, Vectors (Mathematics)

Scientific paper

The gravitational stability of an isotropic nonsingular cosmological model of the universe filled by a collisionless gas of spin-free noncharged particles and by a scalar-torsional field is investigated using a statistical approach in the context of the Einstein-Cartan theory based on the use of a kinetic equation in the Riemann-Cartan space. In the long-wave approximation, the scalar, vector, and tensor perturbations are shown to be sufficiently high at the de Sitter stage and small at the Friedmann stage. At the Friedmann stage, the behavior of scalar perturbations is shown to be similar to the behavior of perturbations in general relativity.

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